- He was in quest of valid (true) certain knowledge.(-Why?)
To establish the principal of practical conduct in a firm foundation (i.e. moral, political, educated principals)
- Is there at least one principal that is absolutely true?
Method. Systematic doubt.
Purpose: To discover a belief we can not doubt and use it as a model for establishing the truth of the preposition.
Well what the sources or means of knowledge?
Let us apply this method.
Skeptics and history.
Most will not support a philosophy.
Focus attention on establishing truth by a critical analysis of knowledge.
3 Cent BC. How does the skeptic cast doubt on a principal?
Human beings know in mind or body.
Skeptics chase the senses.
| - sweet 1. apple as it is in itself.
+ | - smooth 2. The apple as it appears to me.
| - crunchy
5 BC. PRORAGORAS - "Man is a measure of all things. " HOMO MENSURA
Man is a species - Man is an individual - knowledge.
Catholic or Jew - Skeptic.
God is the measure or source of knowledge
Einstein - One person in the same motion as another appears to be stationary.
Preferences - What I like and don't like
Ex. X is good | beautiful
Judgments are based on standards.
Values are included in judgments
- X is beautiful
|T| Proof => Proof => Proof
Life is too short to prove to infinity.
Each philosopher gives a view.
A person reads and reads => What is the truth?
Will I change by adopting a new truth?
| Trial and error
Skeptic. Not truth but happiness.
Descartes. Founder of modern philosopher- Truth is foundation of human nature.
Newton- Set standards of science for 200 years..
Founded a system of knowledge on a foundation of principals and knowledge.
Principles of a practical life.
Institutions are based on true knowledge.
Education system => Justice.
[Knowledge} Where do I start? Answers to our prepositions to give truth.